I have tried printing directly to the plotter (HPdesignjet 5500ps)
and, in case it was a plotter issue, I tried to print to PDF.
in both cases, it just sat there churning for hours. (I went to lunch and came back and it was still churning.)
I will try setting the WCS current...haven't tried that yet. I will also try twisting another mr sid file and see if that one prints (to see if the file is corrupted, or if it is happening universally for me)
sigh...